As I suspected... from a strategy perspective but I now see I made an error. The math is to divide by entries and ignore that Anker said.
If I look at the 1st week:
That was a 3:1415 chance, or 1:472 chance per entry. An older member who had enough bucks could then have 10/3/1415 = 2.12% chance roughly.
Now looking at this week as there are very few members with lots of bucks, so fewer can bid, the odds increase.
So this is now say 10/276x3 = 11% chance of winning, an increased chance of roughly 5x in just a week.
I expect chances can only improve so it becomes asymptotic to regular participating members getting equal chances, which is I think is Anker's intention.